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I was just wondering how that was going....
Posted by George (more from George) on Thu, 22 Jan 2004 10:05:47
In Reply to: 93 Volvo 940 wagon - NJ NOx emissions, Yaofeng, Thu, 22 Jan 2004 08:33:13
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Sorry to hear that the cat didn't help, but I can't say I'm surprised. Bad cats are usually accompanied by high HC levels and your are fine.
High NOX = lean.
Seems we established that the car has no EGR valve, a common cause of high NOX.
If you're sure there are no vacuum leaks, then I'd start to suspect something in the fuel deliver system...plugged injector, low fuel pressure due a bad regulator or bad pump.
The car is running lean...the questions is why?
posted by 209.10.230...
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